CN101241256A - Pixel unit, liquid crystal display panel, photovoltaic device and process for production thereof - Google Patents
Pixel unit, liquid crystal display panel, photovoltaic device and process for production thereof Download PDFInfo
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- CN101241256A CN101241256A CNA2008100838846A CN200810083884A CN101241256A CN 101241256 A CN101241256 A CN 101241256A CN A2008100838846 A CNA2008100838846 A CN A2008100838846A CN 200810083884 A CN200810083884 A CN 200810083884A CN 101241256 A CN101241256 A CN 101241256A
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Abstract
The invention provides a pixel unit, a LCD panel, an electro-optical device and a producing method thereof. Wherein the pixel unit has a display region. The pixel unit comprises a first substrate, a second substrate, a liquid crystal layer and at least one ultraviolet light absorption layer. The second substrate is arranged parallel to the first substrate, and the liquid crystal layer is disposed between the first substrate and the second substrate. The ultraviolet light absorption pattern is disposed between the first substrate and the second substrate. Part of the display region overlaps with the ultraviolet light absorption pattern to define at least one first direction region, and the part which does not overlap with the ultraviolet light absorption pattern defines at least one second direction region. The liquid crystal molecules in the liquid crystal layer are disposed with different tilt angles in the first direction region and in the second direction region. The invented LCD panel and pixel unit facilitate improving color cast condition of large visual angle. Display quality of the electro-optical device is enhanced when the invented LCD panel and pixel unit are used in the electro-optical device.
Description
Technical field
The present invention relates to a kind of pixel cell, display panels, electrooptical device and manufacture method thereof, and be particularly related to a kind of pixel cell, display panels, electrooptical device and manufacture method thereof of wide viewing angle design.
Background technology
Market is to develop towards directions such as height contrast (high contrast ratio), the counter-rotating of no GTG (no gray scale inversion), colour cast little (little color shift), brightness height (high luminance), high color richness, high color saturation, rapid reaction and wide viewing angles for the performance requirement of liquid crystal display panel of thin film transistor (thin film transistor liquid crystaldisplay panel, TFT-LCD panel) now.The correlation technique of wide viewing angle includes stable twisted nematic (TN) display panels and adds view film (wide viewing film), copline suitching type (in-plane switching, IPS) display panels, a limit suitching type (fringe field switching, FFS) display panels and multidomain vertical alignment type (multi-domain vertically alignment, MVA) liquid crystal display panel of thin film transistor etc.
Utilize above-mentioned various technology can make display panels reach the demonstration effect of wide viewing angle.Yet along with the visual angle of observing changes, the gamma that known display panels presented (gamma) curve has different curvature.Therefore, when observation visual angle changed, the shown brightness meeting that goes out of known display panels changed colour cast of further deriving (color shift) or color saturation deficiency problems such as (colorwashout).
In order to solve the problem of colour cast, existing multiple known technology is suggested in succession.Wherein a kind of method is that multiform becomes an electric capacity in single pixel cell, utilizes capacity coupled mode to make the different pixels electrode in the single pixel cell produce different big or small electric fields respectively.Therefore, the liquid crystal molecule of different pixels electrode top can present different arrangement modes to reach different display brightness in the single pixel cell.Though this kind mode can be improved color offset phenomenon, the shortcoming that but causes display quality to descend because capacitance-resistance sluggishness (RC delay) effect is arranged.
Another kind method is to increase a transistor in each pixel cell; That is to say, have two transistors in the single pixel cell.Make two pixel electrodes in single pixel cell present different display voltage by these two transistors, and then allow the liquid crystal molecule of different pixels electrode top that different arrangement modes is arranged, to reach the purpose of improving colour cast.Yet, for two transistors of collocation configuration in single pixel cell, need to increase the number of sweep trace or data line in the display panels, so the method not only increases the complexity of driving circuit, more can influence the demonstration aperture opening ratio of display panels.
Summary of the invention
The present invention provides a kind of pixel cell and manufacture method thereof, to solve the colour cast problem that image that pixel cell was presented is being located with great visual angle.
Another display panels of the present invention and manufacture method thereof solve the colour cast problem to utilize simple design.
The present invention provides a kind of electrooptical device and manufacture method thereof again, and it has high aperture opening ratio and the easy configuration of showing.
The present invention proposes a kind of pixel cell, and it has the viewing area.Pixel cell comprises first substrate, second substrate, liquid crystal layer and at least one UV Absorption layer.Second substrate and the first substrate configured in parallel, and liquid crystal layer is disposed between first substrate and second substrate.The UV Absorption pattern arrangement is between first substrate and second substrate.The subregion of viewing area and UV Absorption pattern overlapping to be defining at least one first orientation district, and the viewing area does not define at least one second orientation district with the subregion of UV Absorption pattern overlapping.In addition, the liquid crystal molecule of liquid crystal layer the first orientation district with present different tilt angles in the second orientation district.
In one of the present invention embodiment, above-mentioned pixel cell also comprises the high molecular polymerization layer, and it is disposed at part first substrate and part second substrate wherein at least one.The high molecular polymerization layer directly contacts liquid crystal layer so that the liquid crystal molecule of liquid crystal layer the first orientation district with present different tilt angles in the second orientation district.
In one of the present invention embodiment, the first above-mentioned substrate also has at least one dielectric layer and at least one common electrode, and common electrode is disposed between dielectric layer and the liquid crystal layer.The UV Absorption pattern for example is between dielectric layer and common electrode, or dielectric layer is between UV Absorption pattern and common electrode.
In one embodiment of the invention, the second above-mentioned substrate has at least one pixel electrode, and the pixel electrode position defines the viewing area.Second substrate also has at least one dielectric layer, and pixel electrode is disposed between dielectric layer and the liquid crystal layer.The UV Absorption pattern is between dielectric layer and pixel electrode, or dielectric layer is between UV Absorption pattern and pixel electrode.On the practice, second substrate for example also has at least one sweep trace, at least one data line and at least one active component.Data line and sweep trace intersect, and active component is electrically connected sweep trace and data line, and pixel electrode is electrically connected active element.
In one embodiment of the invention, the area in the first orientation district than the ratio of the total area in the last first orientation district and the second orientation district in fact greater than 0, and less than 1.
In one embodiment of the invention, the material of above-mentioned UV Absorption pattern comprises at least one UV Absorption material and at least one solvent.
The present invention proposes a kind of display panels in addition, comprises above-mentioned pixel cell.
The present invention reintroduces a kind of electrooptical device, comprises above-mentioned display panels.
The present invention proposes a kind of manufacture method of pixel cell again.Aforesaid pixel cell is provided, and it has the viewing area.Provide ultraviolet light from the UV Absorption pattern away from one of liquid crystal layer side irradiating liquid crystal layer, so that the liquid crystal molecule of liquid crystal layer presents different tilt angles in the first orientation district and in the second orientation district.
In one of the present invention embodiment, above-mentioned manufacture method at pixel cell also is included in and forms at least one voltage difference between first substrate and second substrate.Then, under this voltage difference, provide ultraviolet light from the UV Absorption pattern away from one of liquid crystal layer side irradiating liquid crystal layer, so that the liquid crystal molecule of liquid crystal layer presents different tilt angles in the first orientation district and in the second orientation district.
In one of the present invention embodiment, the manufacture method of above-mentioned pixel cell also is included in and adds a plurality of polymerizable molecules in the liquid crystal layer, wherein behind the UV-irradiation liquid crystal layer, polymerizable molecules wherein forms the high molecular polymerization layer at least one in part first substrate and part second substrate.The high molecular polymerization layer directly contacts liquid crystal layer so that the liquid crystal molecule of liquid crystal layer the first orientation district with present different tilt angles in the second orientation district.
In one of the present invention embodiment, the manufacture method of above-mentioned pixel cell also is included in and forms at least one dielectric layer and at least one common electrode on first substrate, and common electrode is between dielectric layer and liquid crystal layer.
In one of the present invention embodiment, the manufacture method of above-mentioned pixel cell also is included in and forms at least one pixel electrode and at least one dielectric layer on second substrate, and pixel electrode is between dielectric layer and liquid crystal layer.
In one of the present invention embodiment, the manufacture method of above-mentioned pixel cell also is included in and forms at least one sweep trace, at least one data line and at least one active component on second substrate, wherein data line and sweep trace intersect, and active component is electrically connected sweep trace and data line, and pixel electrode is electrically connected active element.
The present invention more proposes a kind of manufacture method of display panels, and it comprises the manufacture method of above-mentioned pixel cell.
The present invention reintroduces a kind of manufacture method of electrooptical device, and it comprises the manufacture method of above-mentioned display panels.
The present invention proposes configuration UV Absorption pattern in the pixel cell of display panels.When pixel cell was arranged with the orientation of the auxiliary liquid crystal molecule of high molecular polymerization layer, the configuration of UV Absorption pattern can make the high molecular polymerization layer in the zones of different present different states.Therefore, in display panels of the present invention and the pixel cell, the liquid crystal molecule of liquid crystal layer can present different tilt angles and help to improve with great visual angle in zones of different, for example: more than or equal to 60 degree, the colour cast situation.When display panels of the present invention and pixel cell are applied to electrooptical device, also help to promote the display quality of this electrooptical device.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Figure 1A is the schematic top plan view of the pixel cell of one of the present invention embodiment.
Figure 1B～Fig. 1 D is the schematic top plan view of the pixel cell of other different embodiment of the present invention.
The pixel cell partial cutaway schematic that Fig. 1 E is illustrated for the hatching line AA ' along Figure 1A.
Fig. 2 A and Fig. 2 B are depicted as along the method for making of the pixel cell shown in the hatching line AA ' of Figure 1A.
Fig. 2 C is the partial cutaway schematic of the pixel cell of another embodiment of the present invention.
Fig. 3 is shown the partial cutaway schematic of viewing area of the pixel cell of further embodiment of this invention.
Fig. 4 is shown the pixel cell schematic top plan view of an embodiment more of the present invention.
Figure 5 shows that the synoptic diagram of the electrooptical device of one embodiment of the present of invention.
Wherein, description of reference numerals is as follows:
10: sweep trace
20: data line
30: active component
40,40B～40D, 314: pixel electrode
42: central part
44: striped portion
46,46C, 46D: slit
46B: opening
50,308,408: the UV Absorption pattern
100,200,300,400: pixel cell
100 ': the pixel cell semi-manufacture
102,302: the first substrates
104,304: the second substrates
106,306: liquid crystal layer
112,312: common electrode
114,214,310: the high molecular polymerization layer
116,118,120,316: dielectric layer
202: polymerizable molecules
204: ultraviolet light
500: electrooptical device
510: display panels
520: electronic component
AA ': hatching line
D: viewing area
P1, P2: orientation district
Embodiment
In order to improve display panels with great visual angle, for example: the colour cast problem more than or equal to 60 degree are presented must make the liquid crystal molecule in the same pixel cell present different arrangement modes to show different display brightness.Therefore, having developed to utilize capacity coupled mode or utilize in known technology increases transistorized mode, makes single pixel cell can present different display brightness simultaneously.Yet these modes all can influence the demonstration aperture opening ratio of display panels, have also increased the complicacy of display panels type of drive simultaneously.
For this reason, the present invention proposes a kind of pixel cell, and it utilizes the configuration of UV Absorption pattern to arrange in pairs or groups suitable technology to form a plurality of orientations district, and the liquid crystal molecule that wherein is arranged in the different alignment district has different tilt angles.Because, when pixel cell carries out the picture demonstration, the driven limit voltage of the liquid crystal molecule of different tilt angles (threshold voltage) difference.So when single pixel cell showed, the different alignment district can present different display brightness, so that color offset phenomenon obtains compensation.Pixel cell of the present invention has the viewing area, and pixel cell comprises that first substrate reaches and second substrate of the first substrate configured in parallel.Liquid crystal layer is disposed between first substrate and second substrate.At least one UV Absorption pattern arrangement is between first substrate and second substrate.The subregion of viewing area and UV Absorption pattern overlapping are to define at least one first orientation district, and the viewing area does not define at least one second orientation district with the subregion of UV Absorption pattern overlapping, wherein the liquid crystal molecule of liquid crystal layer the first orientation district with present different tilt angles in the second orientation district.
Following according to the different designs pattern, several embodiment and manufacture method are proposed as detailed description of the present invention.Yet the present invention is not restricted to this, and the scope that can't limit the present invention will protect of more described embodiment and manufacture method.
Figure 1A is the schematic top plan view of the pixel cell of one embodiment of the present of invention, the schematic top plan view of the pixel cell of Figure 1B～Fig. 1 D other different embodiment of the present invention, and Fig. 1 E is along the pixel cell partial cutaway schematic shown in the hatching line AA ' of Figure 1A.Please earlier with reference to Figure 1A, pixel cell 100 has at least one sweep trace 10, at least one data line 20, at least one active component 30, at least one pixel electrode 40 and UV Absorption pattern 50.Pixel electrode 40 is electrically connected active element 30, and active component 30 also is electrically connected on sweep trace 10 and data line 20.That is to say that the pixel cell 100 of present embodiment is active driven design.Pixel cell 100 also can not have active component 30 and be the design of passive drive formula in other embodiments.
Preferably, the pixel electrode 40 of present embodiment has central part 42 and from the outward extending a plurality of striped of central part 42 portion 44.Central part 42 is interlocked by first section (indicating) and second section (indicating) and forms, and is that a plurality of slits 46 are example between central part 42 and the striped portion 44, but is not limited thereto.In this embodiment, central part 42 is that the cruciform with first section (indicate) and second section (indicating) vertical interlaced is an example, but is not limited thereto, and the angle of cut of first section and second section also can be the figure that the angle except 0 ° is interlocked.When pixel cell 100 showed, only pixel electrode 40 regions can present required picture, so pixel electrode 40 regions roughly are defined as viewing area D.Certainly, the pattern of the pixel electrode 40 shown in Figure 1A only is a kind of enforcement example of the present invention, and in fact the pattern of pixel electrode 40 is not as limit.For example, the described pixel electrode 40B of Figure 1B can have the described pixel electrode 40C of at least one circular opening 46B, Fig. 1 C and be made up of at least one box-shaped pattern, the pixel electrode 40D that defines a plurality of slit 46C, Fig. 1 D between the box-shaped pattern then is made up of at least one spirality, and form slit 46D between the spiral pattern, or other suitable figure, as: Elliptical circle, rhombus, triangle, quadrilateral, pentagon, hexagon, star and other shape.
Please continue with reference to Figure 1A, UV Absorption pattern 50 is arranged in the subregion of viewing area D to define at least one first orientation district P1 and at least one second orientation district P2.The overlapping part of the area of viewing area D and UV Absorption pattern 50 is defined as the first orientation district P1, and viewing area D then is not defined as the second orientation district P2 with the overlapping subregion of the area of UV Absorption pattern 50.The area of the first orientation district P1 is than the ratio of the total area of the last first orientation district P1 and the second orientation district P2, for example: in fact greater than 0, and less than 1.In addition, in the present embodiment, the quantity of UV Absorption pattern 50 is 1, but the quantity of UV Absorption pattern 50 also can be a plurality of in other embodiments.Moreover in the present embodiment, the rectangle that is shaped as of UV Absorption pattern 50 is an example, but is not limited thereto, and also can select triangle, circle, Elliptical circle, spirality, rhombus, quadrilateral, pentagon, hexagon, star or other suitable shape.In addition, in the present embodiment, and with Figure 1A is example, UV Absorption pattern 50 is that the central portion in fact that is arranged in viewing area D is an example, but be not limited thereto, also can be arranged in the other parts of viewing area D, as between: adjacent central portion, contiguous corner, first section and second section or combinations thereof.Moreover in Figure 1B, the opening 46B of pixel electrode 40B is preferably by UV Absorption pattern 50 and covers, but is not limited thereto.The opening 46B of pixel electrode 40B also can be covered or do not covered by UV Absorption pattern 50 by part UV Absorption pattern 50.In addition, in Figure 1B～1D, UV Absorption pattern 50 is that the central portion in fact that is arranged in viewing area D is an example, but is not limited thereto, UV Absorption pattern 50 also can be arranged in the other parts of viewing area D, as: adjacent central portion, contiguous corner or other suitable position.
From the cross-section structure of Fig. 1 E, pixel cell 100 comprises first substrate 102, second substrate 104 and liquid crystal layer 106 in fact.Second substrate 104 and first substrate, 102 configured in parallel, and liquid crystal layer 106 is disposed between first substrate 102 and second substrate 104.UV Absorption pattern 50 also is to be disposed between first substrate 102 and second substrate 104.Present embodiment is that to be disposed on second substrate 104 with UV Absorption pattern 50 be example, implements example medium ultraviolet light absorption patterns 50 at other and also can be disposed on first substrate 102.Certainly, for different design requirements, UV Absorption pattern 50 also can be disposed on first substrate 102 and second substrate 104 simultaneously.At this moment, UV Absorption pattern 50 be disposed at position on first substrate 102 can part corresponding to or do not correspond to UV Absorption pattern 50 and be disposed at position on second substrate 104.
What deserves to be mentioned is, the liquid crystal molecule of liquid crystal layer 106 the first orientation district P1 with present different tilt angles at the second orientation district P2.For example, be arranged in liquid crystal molecule approximate vertical second substrate 104 of the first orientation district P1, and be positioned at not vertical second substrate 104 of liquid crystal molecule of the second orientation district P2.Certainly, the present invention does not limit liquid crystal molecule and why present the tilt angle angle in the first orientation district P1 and the second orientation district P2, wherein liquid crystal molecule the first orientation district P1 with present different tilt angles at the second orientation district P2 just can spirit according to the invention.
Specifically, please be simultaneously with reference to Figure 1A and Fig. 1 E, first substrate 102 also has common electrode 112.When pixel cell 100 showed, formed electric field can be controlled the arrangement of liquid crystal molecule of liquid crystal layer 106 to show required picture brightness between pixel electrode 40 and the common electrode 112.Suppose that the design with the pixel electrode 40 of Figure 1A is that example illustrates, when pixel cell 100 showed, slit 46 can make the electric field in the liquid crystal layer 106 produce distortion.The electrical field deformation direction that these slits 46 are caused can make the liquid crystal molecule bearing of trend arrangement of parallel slits 46 in fact of liquid crystal layer 106.In the present embodiment, slit 46 roughly extends to example towards four direction.The liquid crystal molecule of liquid crystal layer 106 also roughly can be toppled over arrangement to reach the display effect of wide viewing angle towards four direction when therefore, pixel cell 100 showed.Certainly, pixel electrode 40 can be designed to different patterns so that the liquid crystal molecule of liquid crystal layer 106 is arranged towards both direction at least in other embodiments, and reaches the effect of wide viewing angle.
In the pixel cell 100 of present embodiment, preferably, also comprise the high molecular polymerization layer 114 of the liquid crystal molecule of direct contact liquid crystal layer 106.High molecular polymerization layer 114 for example utilizes light allocating process technology to be formed at first substrate 102 and second substrate at least on one of them.Present embodiment is that all to dispose high molecular polymerization layer 114 with first substrate 102 and second substrate 104 be example, implements at other that high molecular polymerization layer 114 also can only be disposed on one of them substrate (102 or 104) in examples.
The UV Absorption pattern 50 of present embodiment can be single layer structure or sandwich construction, and its material comprises organic material, inorganic or combinations thereof.Preferably, present embodiment serves as to implement example with at least one UV Absorption material and at least one solvent of organic material, but is not limited thereto.In other preferred embodiment, the material of UV Absorption pattern 50 also can only have at least one UV Absorption material to get final product.The UV Absorption material of organic material for example is benzotriazole (Benzotriazole), Benzophenone (Benzophenone) class, propionyl acids polymkeric substance, acrylic polymers, benzene vinyl polymer, polyethers, polyketone class, polyalcohols or other suitable material or combinations thereof, but its absorbing wavelength approximates or the light wave below 400 nanometers (ultraviolet light just).The UV Absorption material of inorganic comprises Si oxide, titanium oxide, silicon nitride, silicon oxides of nitrogen, tantalum pentoxide, hafnium oxide or other suitable material or combinations thereof, but its absorbing wavelength approximates or the light wave below 400 nanometers (ultraviolet light just).Carry out the light allocating process and when forming high molecular polymerization layer 114, the configuration of UV Absorption pattern 50 can make the high molecular polymerization floor 114 among different alignment district P1, the P2 receive different energy.Therefore, high molecular polymerization floor 114 can have different molecular structures in different alignment district P1, P2.Liquid crystal molecule in the liquid crystal layer 106 just can be subjected to the influence of high molecular polymerization layer 114 and present different tilt angles.
The driven limit voltage difference of liquid crystal molecule of different tilt angles, thus pixel cell 100 carry out brightness that picture presented at the first orientation district P1 and the second orientation district P2 when showing also can be different.Thus, when pixel cell 100 is applied to display panels, help to improve display panels with great visual angle, for example: more than or equal to the colour cast problems of 60 degree.In general, the area of the first orientation district P1 is than the ratio of the total area of the last first orientation district P1 and the second orientation district P2, for example: in fact greater than 0 and less than 1.And according to the result of test, preferably, the area of the first orientation district P1 is about at 0.5 o'clock than the ratio of the total area of the last first orientation district P1 and the second orientation district P2, and the problem of wide-angle colour cast can obtain improvement by a relatively large margin, but is not limited thereto ratio.
In addition, second substrate 104 for example also has first dielectric layer 116 and second dielectric layer 118, and first substrate 102 for example also has the 3rd dielectric layer 120.Must it should be noted that second substrate 104 and first substrate 102 also have dielectric layer, not need to set up simultaneously that wherein second substrate 104 and first substrate 102 wherein one of at least also have dielectric layer and get final product.For example, first dielectric layer 116 for example is a gate insulator, and second dielectric layer 118 for example is protective seam or flatness layer etc.First dielectric layer 116 and second dielectric layer 118 can be single layer structure or sandwich construction, and the material of above-mentioned dielectric layer can be organic dielectric materials, Inorganic Dielectric Material or combinations thereof, with the different conducting elements in the protection pixel cell 100.In addition, purple light absorption pattern 50 is to be example between first dielectric layer 116 and second dielectric layer 118 at present embodiment.In other embodiments, UV Absorption pattern 50 also can be between the pixel electrode 40 and second dielectric layer 118 or be positioned under first dielectric layer 116.So, 116,118 of dielectric layers are between UV Absorption pattern 50 and pixel electrode 40.112 of common electrodes for example are to be disposed between the 3rd dielectric layer 120 and the liquid crystal layer 106.On the practice, the 3rd dielectric layer 120 can be single layer structure or sandwich construction, and its material is inorganic dielectric layer, organic dielectric layer or combinations thereof.
Because UV Absorption pattern 50 can be disposed on first substrate 102.So with the order of rete, UV Absorption pattern 50 for example is between the 3rd dielectric layer 120 and common electrode 112, or the 3rd dielectric layer 120 is between UV Absorption pattern 50 and common electrode 112.Certainly, pixel cell 100 can also also include the chromatic filter layer (not shown), its be positioned on first substrate 102 or on second substrate 104 so that pixel cell 100 presents the display effect of colouring.When the chromatic filter layer (not shown) is positioned on second substrate 104, the chromatic filter layer (not shown) can constitute chromatic filter layer with active component 30 integration and be disposed at active device array (Color filter on Array, COA) or active device array is disposed at chromatic filter layer (Array on Color filter, structure AOC).When the chromatic filter layer (not shown) was positioned on first substrate 102, then the chromatic filter layer (not shown) was positioned under the common electrode 112.In addition, the chromatic filter layer (not shown) does not influence the UV Absorption of UV Absorption pattern 50.
Fig. 2 A and Fig. 2 B are shown the method for making of the pixel cell that is illustrated along the hatching line AA ' of Figure 1A.Please earlier with reference to Fig. 2 A, at first provide pixel cell semi-manufacture 100 ', wherein pixel cell semi-manufacture 100 ' are for example with the structural similarity of above-mentioned pixel cell 100 and be example, but are not limited thereto.That is to say the subelement symbology components identical identical in the pixel cell semi-manufacture 100 ' with pixel cell 100.In addition, can comprise a plurality of polymerizable molecules 202 in the liquid crystal layer 106.Polymerizable molecules 202 has photopolymerisable character for instance, so polymerizable molecules 202 is once can produce polymerization and solidify after being subjected to the irradiate light of enough energy.
Then, in present embodiment, preferably, between first substrate 102 and second substrate 104, form at least one voltage difference.The mode that forms this voltage difference for example is to apply different voltage in pixel electrode 40 and common electrode 112.At this moment, the liquid crystal molecule of liquid crystal layer 106 can be subjected to the electric field action between first substrate 102 and second substrate 104 and topple over.Liquid crystal molecule shown in Fig. 2 A swing to only usefulness for illustrating.When design such as Figure 1A of pixel electrode 40 are depicted as example, when pixel electrode 40 was bestowed voltage, the liquid crystal molecule of liquid crystal layer 106 is prolonging the bearing of trend of slit 46 in fact to be arranged, but was not limited thereto the design of pixel electrode 40.
Then, when presenting the particular arrangement mode because being subjected to the electric field action influence when the liquid crystal molecule of liquid crystal layer 106, provide at least one ultraviolet light 204 from UV Absorption pattern 50 away from one of liquid crystal layer 106 side irradiating liquid crystal layer 106.For example, from second substrate 104 away from one of liquid crystal layer 106 side irradiating ultraviolet light 204.The wavelength of ultraviolet light 204 for example is about 365 nanometers, and ultraviolet light 204 is provided in every square centimeter energy and for example is about 30 joules.Certainly, above-mentioned wavelength and energy only are usefulness for example, and the present invention is not limited to this.In addition, above-mentioned wavelength and energy change simultaneously also applicable it.Thereupon, please be simultaneously with reference to Fig. 2 A and Fig. 2 B, polymerizable molecules 202 receives and can produce polyreaction behind the ultraviolet lights 204 and in one of them side formation high molecular polymerization layer 114 of liquid crystal layer 106.On the practice, the above each step can be called the light allocating process.
In the present embodiment, UV Absorption pattern 50 is disposed on second substrate 104, so ultraviolet light 204 for example is to shine in liquid crystal layer 106 from second substrate, 104 outsides.In other words, part ultraviolet light 204 shone before liquid crystal layer 106 and can shine earlier in UV Absorption pattern 50.These shine in the part ultraviolet light 204 of UV Absorption pattern 50 and can be absorbed, and can't fully shine in liquid crystal layer 106.So it is lower to be positioned at ultraviolet light 204 energy that the polymerizable molecules 202 of UV Absorption pattern 50 tops received, and ultraviolet light 204 energy that received of the polymerizable molecules above UV Absorption pattern 50 202 are not higher.
The high molecular polymerization layer 114 of polymerizing curable may have different molecular structures under different-energy, and defines the first orientation district P1 and the second orientation district P2.In fact, the high molecular polymerization floor 114 that is positioned at the second orientation district P2 is formed under higher energy, and can note down the arrangement mode of the liquid crystal molecule of liquid crystal layer 106 at that time.Therefore, after the voltage difference between first substrate 102 and second substrate 104 was removed, the liquid crystal molecule that is positioned at the second orientation district P2 can present specific tilt angle, and is not orthogonal to second substrate 104.In addition, high molecular polymerization floor 114 has different molecular structures at the first orientation district P1 with the second orientation district P2.So the liquid crystal molecule of liquid crystal layer 106 then may be perpendicular to 104 arrangements of second substrate or present another specific tilt angle among the first orientation district P1.Thus, the design of pixel cell 100 helps to improve with great visual angle, for example: more than or equal to the color offset phenomenon of 60 degree.Compare with the known technology of improving color offset phenomenon, the design of pixel cell 100 can have higher demonstration aperture opening ratio, and pixel cell 100 does not need to arrange in pairs or groups mutually with the type of drive of complexity yet.
In other embodiments, can between first substrate 102 and second substrate 104, not form voltage difference in the step of light allocating process yet, and utilize different-energy or the light of different polarization direction makes high molecular polymerization layer 114 have specific molecular structure.So, the liquid crystal molecule of liquid crystal layer 106 also can present different tilt angles respectively in the first orientation district P1 and the second orientation district P2.In other words, the present invention does not limit and makes high molecular polymerization layer 114 have different molecular structures in which way in zones of different.The thinkable mode of those skilled in the art under all, it can make high molecular polymerization layer 114 have the manufacture method that different molecular structures all can be used as pixel cell of the present invention in zones of different.In addition, in other embodiments, liquid crystal layer 106 can not be mixed with polymerizable molecules 202 yet, and forms the first orientation district P1 and the second orientation district P2 in other mode.
In addition, in pixel cell 100, sweep trace 10, data line 20 mostly are made up of the conductive material of shadings such as metal with the material of active component 30 (as: thin film transistor (TFT) (TFT)).Ultraviolet light 204 can't penetrate these elements, and makes polymerizable molecules 202 produce polymerization in these element tops.Therefore, sweep trace 10, data line 20 can't be formed with high molecular polymerization layer 114 with top, active component 30 regions.In other words, absorbed fully by UV Absorption pattern 50 if shine in the part ultraviolet light 204 of UV Absorption pattern 50, then UV Absorption pattern 50 tops can't be formed with high molecular polymerization layer 114.
For instance, Fig. 2 C is the partial cutaway schematic of the pixel cell of another embodiment of the present invention.Please refer to Fig. 2 C, pixel cell 200 for example is that the processing step via above-mentioned Fig. 2 A is made, so the structural similarity of pixel cell 200 and pixel cell semi-manufacture 100 '.Pixel cell 200 is that with the difference of pixel cell semi-manufacture 100 ' UV Absorption layer 50 can be fully with UV Absorption.Because high molecular polymerization layer 214 is to be solidified to form after polymerizable molecules receives ultraviolet light.So in the middle of the processing step of pixel cell 200, the zone that ultraviolet light can't shine promptly can't produce high molecular polymerization layer 214.In other words, the high molecular polymerization floor 214 of pixel cell 200 only is formed among the second orientation district P2.At this moment, the tilt angle of liquid crystal molecule, and helps with great visual angle also just with different at the second orientation district P2 at the first orientation district P1 in the liquid crystal layer 106, and for example: the colour cast problems more than or equal to 60 degree compensate.In other embodiments, when the high molecular polymerization floor 214 of pixel cell 200 is formed among the first orientation district P1 and the second orientation district P2 simultaneously, preferably,, but be not limited thereto in fact less than thickness at the thickness of the high molecular polymerization floor 214 of the first orientation district P1 at the high molecular polymerization floor 214 of the second orientation district P2.
In the aforementioned embodiment, pixel cell 100 all is to be disposed on second substrate 104 with the UV Absorption pattern 50 of pixel cell 200, but the present invention is not limited to this.Fig. 3 is shown the partial cutaway schematic of viewing area of the pixel cell of further embodiment of this invention.Please refer to Fig. 3, pixel cell 300 comprises first substrate 302, second substrate 304, liquid crystal layer 306 and at least one UV Absorption pattern 308.Second substrate 304 and first substrate, 302 configured in parallel, and liquid crystal layer 306 is disposed between first substrate 302 and second substrate 304.308 in UV Absorption pattern is disposed on first substrate 302.UV Absorption pattern 308 regions define the first orientation district P1, and the subregion outside the UV Absorption pattern 308 defines at least one second orientation district P2.In addition, the liquid crystal molecule of liquid crystal layer 308 the first orientation district P1 with present different tilt angles at the second orientation district P2.
Certainly, pixel cell 300 can have high molecular polymerization layer 310, and it is positioned at first substrate 302 and second substrate 304 at least on one of them.At present embodiment is that to be disposed at simultaneously with high molecular polymerization layer 310 on first substrate 302 and second substrate be example.In other embodiments, high molecular polymerization layer 310 can only be disposed at first substrate 302 and second substrate 304 on one of them.High molecular polymerization layer 310 is formed through the curing of light allocating process by the polymerizability molecule.Therefore, the configuration of UV Absorption pattern 308 can influence the molecular structure of high molecular polymerization floor 310 in the first orientation district P1 and the second orientation district P2, and makes the liquid crystal molecule of liquid crystal layer 308 present different tilt angle.
In fact, the UV Absorption pattern 308 of present embodiment is to be disposed on first substrate 302, and when therefore carrying out the light allocating process, ultraviolet light needs to shine in liquid crystal layer 306 from the outside of first substrate 302.Thus, UV-irradiation can be variant in the energy of the first orientation district P1 and the second orientation district P2, and can make the liquid crystal molecule of liquid crystal layer 308 present different tilt angles.In other embodiments, if UV Absorption pattern 308 is disposed on first substrate 302 and second substrate 304 simultaneously, when then carrying out the light allocating process, ultraviolet light can be from first substrate, 302 outsides and second substrate, 304 outsides simultaneously or do not shine simultaneously in liquid crystal layer 306 or only from first substrate, 302 outsides and one of them irradiation of 304 outsides of second substrate.That is to say, be provided with on what substrate, decide the direction of illumination of ultraviolet light according to UV Absorption pattern 308.
In addition, pixel cell 300 can be active driven design or the design of passive drive formula.The pixel cell 300 of present embodiment is to be example with active driven design, so pixel cell 300 comprises the common electrode 312 and pixel electrode 314 that lays respectively on first substrate 302 and second substrate 304.Common electrode 312 and pixel electrode 314 can form at least one electric field so that the liquid crystal molecule of liquid crystal layer 306 is driven and shows between first substrate 302 and second substrate 304.In addition, dispose at least one dielectric layer 316 between UV Absorption pattern 308 and the common electrode 312, in other embodiments, UV Absorption pattern 308 also can be between dielectric layer 316 and common electrode 312.
Fig. 4 is shown the pixel cell schematic top plan view of an embodiment more of the present invention.Please refer to Fig. 4, the element of pixel cell 400 is similar to the element composition of the pixel cell of Figure 1A 100, and wherein only the allocation position of the UV Absorption pattern 408 of pixel cell 400 is different with the allocation position of UV Absorption pattern 50.The viewing area D of pixel cell 400 is roughly defined out by pixel electrode 40 regions.In the present embodiment, UV Absorption pattern 408 for example is roughly to surround frame, and the shape that plan view shape is essentially rectangle and pixel electrode 40 is example with Figure 1A, but is not limited thereto.In other embodiments, the shape of UV Absorption pattern 408 also can be selected triangle, circle, Elliptical circle, spirality, rhombus, quadrilateral, pentagon, hexagon, star or other suitable shape.UV Absorption pattern 408 is overlapping to define the first orientation district P1 with the subregion of viewing area D.Viewing area D then is not two second orientation district P2 with the overlapping part of the area of UV Absorption pattern 408.In addition, the UV Absorption pattern 408 of present embodiment is an example with one, but is not limited thereto, and also can be a plurality of.
Pixel cell 400 for example also includes the liquid crystal layer (not shown), and it is in order to as display medium.In the present embodiment, the design that pixel electrode 40 has a plurality of slits 46 is preferable enforcement example, and the liquid crystal molecule of liquid crystal layer (not shown) is arranged towards different directions under same display voltage.So pixel cell 400 can present the display effect of wide viewing angle.In other embodiments, pixel electrode also can be as described figure, at least one shaped as frame, at least one spirality with at least one circular open of above-mentioned Figure 1B～Fig. 1 D, or other suitable figure, as: Elliptical circle, rhombus, triangle, quadrilateral, pentagon, hexagon, star and other shape.In addition, by the content of previous embodiment as can be known, the configuration of UV Absorption pattern 408 can influence light allocating process medium ultraviolet rayed in the energy distribution of different alignment district P1, P2.So disposing of UV Absorption pattern 408 helps make the liquid crystal molecule of liquid crystal layer (not shown) in the pixel cell 400 to arrange with different tilt angles at different alignment district P1, P2.Therefore, when pixel cell 400 shows, be difficult for further taking place with great visual angle, for example: more than or equal to the colour cast problem of 60 degree.In brief, pixel cell 400 can present good display effect.
In the present embodiment the area of the first orientation district P1 than the ratio of the total area of the last first orientation district P1 and the second orientation district P2 in fact greater than 0, and less than 1.That is to say that in the pixel cell 400, UV Absorption pattern 408 is disposed among the D of viewing area so that with great visual angle at least, for example: the color offset phenomenons more than or equal to 60 degree are improved.The present invention does not limit the shape that allocation position and area thereof constituted of UV Absorption pattern 408.In addition, UV Absorption pattern 408 is also configurable between any rete of pixel cell 400 in the D of viewing area.In addition, the described UV Absorption pattern 408 of present embodiment is disposed at first substrate and/or second substrate, irradiation direction of light and UV Absorption pattern 408 receptivities, can consult the described content of the foregoing description.
Each pixel cell 100,200,300 and 400 described above all only is to illustrate.The electric field that drives liquid crystal layer 106,306 and 406 in the pixel cell 100,200,300 and 400 proposed by the invention can also be formed by a plurality of electrodes on the same substrate.That is to say that pixel cell design of the present invention can be horizontal switch type (In-Plane Switching, pixel design IPS).Moreover the zone in the middle of the active component 30 of the foregoing description is positioned in fact is an example, but is not limited thereto, but also on other position.
In addition, in the foregoing description, sweep trace 10 often has the indefinite phenomenon generation of toppling direction and causes light leak with the liquid crystal molecule of data line 20 tops.In order to prevent above-mentioned light leak situation, preferably, on first substrate 102 or second substrate 103 be provided with the black matrix" (not shown), then just can not produce polyreaction corresponding to the polymerizable molecules on the black matrix (not shown), also can not produce high molecular polymerization layer 114, but be not limited thereto.Suppose to have on the pixel design other member to exist, then just do not need this black matrix" with identical function.
Moreover, in the above embodiment of the present invention, active component 30, for example: thin film transistor (TFT), to be arranged at pixel region wherein on one side, for example: the central portion of neighbor scanning line 10 is an example, but be not limited thereto, also can be arranged at away from central portion or other suitable position.In addition, the structure of active component 30 is an example with the bottom gate polar form, but is not limited thereto, and also can use top grid type or other suitable structure.And, in the foregoing description, preferably, the irradiation direction of light all with in fact perpendicular to being example away from first substrate of liquid crystal layer and/or the surface of second substrate, but be not limited thereto, also can select the angle between 0～90 degree.That is to say, the direction of irradiates light with have the angle of inclination away from first substrate of liquid crystal layer and/or the surface of second substrate.
Figure 5 shows that the synoptic diagram of the electrooptical device of one embodiment of the present of invention.Please refer to Fig. 5, electrooptical device 500 comprises display panels 510 and the electronic component 520 that is electrically connected with it.Display panels 510 comprises aforesaid pixel cell 100,200,300 and 400 one of them kind.So the manufacture method of display panels 510 for example comprises the manufacture method of above-mentioned various pixel cell 100,200,300 and 400.Pixel cell 100,200,300 and 400 has good display quality, and type of drive is simple, so electrooptical device 500 also has above-mentioned various advantages.Certainly, the pixel cell in the display panels 510 can be the pixel cell of other design concepts according to the invention also, is not limited to this.
More advance one, as differentiation, display panels 510 comprises multiple different type according to different display modes, rete design and display medium.Common display panels 510 comprises as the penetrating type display panel, the semi penetration type display panel, reflective display panel, colored filter display panel of (color filter on array) on active layer, active layer display panel of (array on colorfilter) on colored filter, vertical orientation type (vertical alignment, VA) display panel, horizontal switch type (in plane switch, IPS) display panel, multi-domain perpendicular alignment-type (multi-domain verticalalignment, MVA) display panel, twisted nematic (twist nematic, TN) display panel, super-twist nematic (super twist nematic, STN) display panel, pattern vertical orientation type (patterned-silt vertical alignment, PVA) display panel, super pattern vertical orientation type (super patterned-silt vertical alignment, S-PVA) display panel, the advanced person is type (advance super view with great visual angle, ASV) display panel, fringe field switch type (fringe field switching, FFS) display panel, continuous fireworks shape arrange type (continuous pinwheel alignment, CPA) display panel, rotational symmetry is arranged micella type (axially symmetric aligned micro-cell mode, ASM) display panel, optical compensation curved arrange type (optical compensation banded, OCB) display panel, super horizontal switch type (super in plane switching, S-IPS) display panel, advanced super horizontal switch type (advanced super in plane switching, AS-IPS) display panel, extreme edge electric field switch type (ultra-fringe field switching, UFFS) display panel, stabilizing polymer alignment-type display panel, double vision angle type (dual-view) display panel, three visual angle type (triple-view) display panels, 3 d display (three-dimensional) or other profile plate, or above-mentioned combination, also be called non-light-emitting display panel.If display medium comprises liquid crystal material and electroluminescence material simultaneously, then be called hybrid (hybrid) display panel or half self-luminescent display panel.If display medium is the liquid crystal material, right electroluminescence material is provided with in the pixel region or under the display panel, then also can be described as hybrid (hybrid) display panel or half self-luminescent display panel.
In addition, electronic component 520 comprises as control element, executive component, treatment element, input element, memory cell, driving element, light-emitting component, protecting component, sensing element, detecing element or other function element or aforementioned combination.Generally speaking, the type of electrooptical device 500 comprises panel in portable product (as mobile phone, video camera, camera, notebook computer, game machine, wrist-watch, music player, electronic mail transceiver, map navigator, numerical digit photograph or similar products like), video and audio product (as audio and video player or similar products like), screen, TV, billboard, the projector etc.In addition, the present invention proposes the manufacture method of electrooptical device, and it comprises the manufacture method of display panels 510.
In sum, the present invention disposes the UV Absorption pattern in pixel cell so that pixel cell has at least two orientation districts, and wherein the liquid crystal molecule of liquid crystal layer presents different tilt angles in the different alignment district.The driven limit voltage of liquid crystal molecule (threshold voltage) difference of different tilt angles, thereby help to improve with great visual angle, for example: more than or equal to the colour cast problem of 60 degree.In addition, need not set up the element that capacitance electrode or transistor etc. are unfavorable for showing the aperture opening ratio lifting in the pixel cell design of the present invention, and more possess good display effect.Furthermore, when pixel cell of the present invention is applied to display panels and electrooptical device, also help to promote the quality of display panels and electrooptical device.
Though the present invention with preferred embodiment openly as above; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little variation and modification, so protection scope of the present invention is as the criterion when looking the accompanying Claim person of defining.
Claims (22)
1, a kind of pixel cell has the viewing area, and described pixel cell comprises:
First substrate;
Second substrate is with the described first substrate configured in parallel;
Liquid crystal layer is disposed between described first substrate and described second substrate; And
At least one UV Absorption pattern, be disposed between described first substrate and described second substrate, the subregion of described viewing area and described UV Absorption pattern overlapping are to define at least one first orientation district, and described viewing area does not define at least one second orientation district with the subregion of described UV Absorption pattern overlapping, the liquid crystal molecule of wherein said liquid crystal layer the described first orientation district with present different tilt angles in the described second orientation district.
2, pixel cell as claimed in claim 1, also comprise at least one high molecular polymerization layer, be disposed at described first substrate of part and described second substrate of part wherein at least one, described high molecular polymerization layer directly contacts described liquid crystal layer so that the liquid crystal molecule of described liquid crystal layer the described first orientation district with present different tilt angles in the described second orientation district.
3, pixel cell as claimed in claim 1, wherein said first substrate also has at least one dielectric layer and at least one common electrode, and described common electrode is disposed between described dielectric layer and the described liquid crystal layer.
4, pixel cell as claimed in claim 3, wherein said UV Absorption pattern between described dielectric layer and the described common electrode and described dielectric layer between described UV Absorption pattern and described common electrode one of them.
5, pixel cell as claimed in claim 1, wherein said second substrate has at least one pixel electrode, and described pixel electrode defines described viewing area.
6, pixel cell as claimed in claim 5, wherein said second substrate also has at least one dielectric layer, and described pixel electrode is disposed between described dielectric layer and the described liquid crystal layer.
7, pixel cell as claimed in claim 6, wherein said UV Absorption pattern between described dielectric layer and the described pixel electrode and described dielectric layer between described UV Absorption pattern and described pixel electrode one of them.
8, pixel cell as claimed in claim 5, wherein said pixel electrode have at least one central part and from the outward extending a plurality of striped of described central part portion, and are a plurality of slits between described central part and the more described striped portion.
9, pixel cell as claimed in claim 8, when wherein said pixel electrode was bestowed voltage, the liquid crystal molecule of described liquid crystal layer was prolonging the bearing of trend of more described slit in fact and is arranging.
10, pixel cell as claimed in claim 5, wherein said second substrate also has at least one sweep trace, at least one data line and at least one active component, described data line and described sweep trace intersect, and described active component is electrically connected described sweep trace and described data line, and described pixel electrode is electrically connected described active component.
11, pixel cell as claimed in claim 1, the area in the wherein said first orientation district than the ratio of the total area in the above first orientation district and the described second orientation district in fact greater than 0, and less than 1.
12, pixel cell as claimed in claim 1, the material of wherein said UV Absorption pattern comprise at least one UV Absorption material and at least one solvent, or at least one UV Absorption material.
13, a kind of manufacture method of pixel cell comprises:
Pixel cell is provided, has the viewing area, and described pixel cell comprises:
First substrate;
Second substrate is with the described first substrate configured in parallel;
Liquid crystal layer is disposed between described first substrate and described second substrate;
At least one UV Absorption pattern, be disposed between described first substrate and described second substrate, the subregion of wherein said viewing area and described UV Absorption pattern overlapping to be defining at least one first orientation district, and described viewing area does not define at least one second orientation district with the subregion of described UV Absorption pattern overlapping; And
Provide ultraviolet light to shine described liquid crystal layer away from a side of described liquid crystal layer, so that the liquid crystal molecule of described liquid crystal layer presents different tilt angles in the described first orientation district and in the described second orientation district from described UV Absorption pattern.
14, the manufacture method of pixel cell as claimed in claim 13, also be included in and form at least one voltage difference between described first substrate and described second substrate, and under described voltage difference, provide ultraviolet light to shine described liquid crystal layer away from a side of described liquid crystal layer, so that the liquid crystal molecule of described liquid crystal layer presents different tilt angles in the described first orientation district and in the described second orientation district from described UV Absorption pattern.
15, the manufacture method of pixel cell as claimed in claim 13, also be included in and add a plurality of polymerizable molecules in the described liquid crystal layer, behind the described liquid crystal layer of wherein said UV-irradiation, more described polymerizable molecules forms the high molecular polymerization layer in described first substrate of part and one of them individual going up of described second substrate of part, described high molecular polymerization layer directly contacts described liquid crystal layer so that the liquid crystal molecule of described liquid crystal layer the described first orientation district with present different tilt angles in the described second orientation district.
16, the manufacture method of pixel cell as claimed in claim 13 also is included in and forms at least one dielectric layer and at least one common electrode on described first substrate, and described common electrode is between described dielectric layer and described liquid crystal layer.
17, the manufacture method of pixel cell as claimed in claim 13 also is included in and forms at least one pixel electrode and at least one dielectric layer on described second substrate, and described pixel electrode is between described dielectric layer and described liquid crystal layer.
18, the manufacture method of pixel cell as claimed in claim 17, also be included in and form at least one sweep trace, at least one data line and at least one active component on described second substrate, wherein said data line and described sweep trace intersect, and described active component is electrically connected described sweep trace and described data line, and described pixel electrode is electrically connected described active component.
19, a kind of display panels comprises pixel cell as claimed in claim 1.
20, a kind of manufacture method of display panels comprises the manufacture method of pixel cell as claimed in claim 13.
21, a kind of electrooptical device comprises display panels as claimed in claim 19.
22, a kind of manufacture method of electrooptical device comprises the manufacture method of display panels as claimed in claim 20.
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Cited By (5)
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| CN104570495A (en) * | 2015-01-29 | 2015-04-29 | 深圳市华星光电技术有限公司 | Manufacturing method of liquid crystal display panel |
| CN110031990A (en) * | 2019-02-15 | 2019-07-19 | 昆山龙腾光电有限公司 | Liquid crystal display device and its driving method |
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| JP4077935B2 (en) * | 1998-07-01 | 2008-04-23 | キヤノン株式会社 | Liquid crystal element |
| KR101093253B1 (en) * | 2004-09-02 | 2011-12-14 | 엘지디스플레이 주식회사 | In-Plane Switching mode LCD and the fabrication method thereof |
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| CN104570495A (en) * | 2015-01-29 | 2015-04-29 | 深圳市华星光电技术有限公司 | Manufacturing method of liquid crystal display panel |
| CN104570495B (en) * | 2015-01-29 | 2017-09-29 | 深圳市华星光电技术有限公司 | The preparation method of liquid crystal display panel |
| WO2020082514A1 (en) * | 2018-10-23 | 2020-04-30 | 惠科股份有限公司 | Array substrate and display device |
| CN110031990A (en) * | 2019-02-15 | 2019-07-19 | 昆山龙腾光电有限公司 | Liquid crystal display device and its driving method |
| CN110286510A (en) * | 2019-07-10 | 2019-09-27 | 深圳市华星光电半导体显示技术有限公司 | A kind of multi signal HVA mode liquid crystal display panel |
| CN110412789A (en) * | 2019-07-10 | 2019-11-05 | 深圳市华星光电技术有限公司 | The regulation method of backlight module and its light transmittance |
| CN110412789B (en) * | 2019-07-10 | 2020-09-01 | 深圳市华星光电技术有限公司 | Backlight module and light transmittance regulation and control method thereof |
| CN110286510B (en) * | 2019-07-10 | 2020-10-16 | 深圳市华星光电半导体显示技术有限公司 | Multi-signal HVA mode liquid crystal display panel |
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